This bar chart displays the top 10 technologies used by StackOverflow survey respondents in 2018, measured by percentage of users. It reads data from a CSV file and renders horizontal bars using an SVG. The code imports specific functions from d3—including `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom`—to construct the scales and axes, and appends rectangles for each bar. The chart’s styling is applied via a separate CSS file, which sets the bars to steelblue and adjusts text size.